Ford 2001 Ranger, Manual

Page: 247 / 1218

303-14-4 303-14-4 Electric Motor Management
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1854 MOTOR TEMPERATURE OUT OF RANGE
TEST STEP ACTION TO TAKE
—1340 ohms=150
°
C (302
°
F)
•
Is the TRNTEMP PID approximately equal to the resistance
readings from the motor temperature test box?
No = GO to A2.
A2 VERIFY THE MEASURED RESISTANCE/TEMPERATURE IS IN
RANGE
•
Note the measured resistance in test step A1 Yes = GO to A3.
•
Is the resistance within the range indicated in the table test step A1?
No = REPLACE the
motor/transaxle. REFER to
Section 303-01 .
A3 CHECK CIRCUITS 3708 (BR) AND 3757 (BK/W) FOR OPEN(S)
•
Connect 104-Pin Breakout Box (BOB) to TIM C4998, C4999 using the Yes = Go to A4.
BCM/TIM BOB Adapter Cable Overlay; leave the TIM disconnected.
•
With key OFF, measure the resistance of the (BR) wire between pin 5 on
the motor/transaxle C4993 and BOB pin A2.
•
With key OFF, measure the resistance of the (BK/W) wire between pin 2
on the motor transaxle C4993 and BOB pin A11.
No = REPAIR the wire(s) in
question.
•
Are the resistances less than 5 ohms?
A4 CHECK CIRCUITS 3708 (BR) AND 3757 (BK/W) FOR SHORT(S)
TO POWER
•
With key ON, measure the voltage between BOB pins A2, A11 and Yes = REPAIR the wire(s) in
ground (BOB pin A29). question.
•
Is the outside/recirculation door in the recirculation position?
No = GO to A5.
A5 CHECK CIRCUITS 3708 (BR) FOR SHORT TO GROUND
•
With key OFF, measure the resistance between BOB pins A2 and ground Yes = GO to A6.
(BOB pin A29)
•
Is the resistance greater than 10,000 ohms?
No = REPAIR the (BR) wire.
A6 CHECK TIM AND TRANSAXLE TEMP. SENSE CIRCUIT FOR
INTERMITTENT OPEN/SHORT
Yes = CONTINUE to monitor.
CAUTION:
Call the National Hotline
If the vehicle is operated on a hoist, set up a safety perimeter around the
1-800-826-4694 for further
vehicle using the safety cones and keep away from moving wheels and
instructions.
shafts.
•
With the Breakout Box installed, reconnect the TIM. With the key ON,
monitor the voltage between the circuit 3708 (BR) BOB pin A2 and circuit
3757 (BK/W) BOB pin A11. This will allow monitoring of the voltage
drop across the temperature sensor resistor in the transaxle. The temp.
sensor in the transaxle is connected to a 5.0V reference voltage from the
TIM. The voltage across the transaxle temp. sensor should be between
0.8V and 4.0V, depending on the temperature. To recreate the fault it may
be necessary to lift the vehicle on a hoist and operate the vehicle in-gear to
heat up the TIM and transaxle.
•
Is the voltage between 0.8 and 4.0V?
No = If the voltage is between 4.9
and 5.1V, Go to A7.
If the voltage is 0V, GO
to
A8.
A7 CHECK FOR OPEN IN TRANSAXLE TEMP. SENSOR
(Continued)
2001 Ranger EV, 01/2001